While there is no "official" TubeMate for Windows that uses a standard license key system like paid office software, there are several versions available through the and third-party developers that offer similar functionality. The Status of TubeMate on Windows
Ensure the key you bought is for the specific version (e.g., TubeMate 3.x) you have installed. windows tubemate license key new
Visit the official TubeMate website (don't trust random third-party mirrors!) and download the APK. Drag & Drop: Install the APK into your emulator. Microsoft Store While there is no "official" TubeMate